[Note 12]

Kendall L. Walton, "Transparent Pictures: On the Nature of Photographic Realism," Nous 18 (1984): 66. Walton's work is part of a larger philosophical debate about form and experience of pictorial representation. See also Robert Hopkins, "Explaining Depiction," The Philosophical Review 104 (July 1995): 425-55; Nelson Goodman, Languages of Art, 2d edn. (London, 1976); Richard Wollheim, Art and Its Objects, 2d edn. (London, 1980).